Saw-guide



(No Model.)

H. L. JOHNSTON 85 J. E. SANDBERG.

SAW GUIDE.

No 492,299. Patented Feb. 21, 1893;

WITNESSES: M

INVENTORSI W sy l ATTORNEYS.

UNITED STATES PATENT OFFICE.

HENRY L. JOHNSTON AND JOHN E. SANDBERG, OF BUTTE CITY, MONTANA.

SAW-GUIDE.

SPECIFICATION forming part of Letters Patent No. 492,299, dated February21, 1893.

Application filed August 27, 1892. Serial No. 444,282- (No model.)

tana, have invented a new and Improved Saw- Guide, of which thefollowing is a full, clear, and exact description.

The object of the invention is to provide a new and improved saw guidewhich is simple and durable in construction, very effective inoperation, and designed for conveniently sawing logs and other materialat any desired angle.

The invention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

Referenceis to be had to the accompanying drawing forming part of thisspecification,in which the figure is a perspective view of theimprovement.

The improved saw guide is provided with a plate A, preferably made intwo parts hinged together at A, so that the plate can be convenientlyfolded to take up very little space in the carpenters tool chest. Theplate A is supported in two or more carriers B, each formed with aU-shaped head and a leg B, having a curved foot B adapted to rest on topof the log to be sawed. The head of each carrierB is formed in itsvertical end with apertures for the passage of the horizontally extending legs of the L-shaped arms 0 and 0', adapted to be boltedtogether on top of the plate A by bolts D, as is plainly illustrated inthe drawing, the said legs being adjustable transversely so as to fitover logs of different diameters. The downwardly extending legs of thearms 0 and O are provided with slots 0 in each of which is held adjustably a bolt E formed on its head with a nut, in which screws ahandled screw rod F adapted to engage the side of the log G, so as tofasten the arms 0 and O in place on the log, and thereby prevent lateralshifting of the plateAabove the log.

As shown in the drawing, two supporting devices for the plate A arearranged on 0pposite sides of the hinge A, and in order to preventaccidental closing of the plate A, I provide an L-shaped arm I-I, oneleg of which extends over the joint at the hinge A, its

other leg being provided with a point H adapted to be driven into theside of the log.

In each of the free ends of the plate A is fitted to slide and to turn aslotted transversely extending set screwJ screwing in the top of theframe 1 upon the top of the plate A. In the ends of the frame I arearranged verticall y-extendin g gu ide-ways I and I in which are fittedto slide loosely the ends of an inverted U-shaped frame K, supporting,on the vertical ends, the bars L, by means of set screws N and N, thebars L, being a sufficient distance from the corresponding vertical endof the frame K, to permit a free passage of the saw blade.

The frame K and its attached bars L straddle the log and the saw isreciprocated through the space between the depending ends of the frame Kand the bars L; the set screws N resting on the back of the saw andpermitting the frame K as a Whole to descend as the depth of the cutincreases.

As shown in the drawings, the log G is supported on trusses O and issecured thereon by suitable dogs P held on the trusses. The top of theplate A is graduated, the graduation rep-' resenting linear measurementand also angles, so that the frame I can be set on the said graduationfor straight cuts suitable distances apart, andalso for angular cuts,according to the desired bevel to be formed on the end of the log. It isunderstood that this desired bevel is indicated by the angle graduationon the top of the plate A.

The operator, before commencing to saw, adjusts the frame I to thedesired graduation on the top of the plate A. The frame K is then in anuppermost position so that the saw blade on top of the log can beconveniently straddled by the ends of the frame and the bars L, aspreviously described. The saw can now be moved forward and backward formaking the desired cut in the log, it being understood that the saw isguided in its downward movement by the frame K, which slides looselydownward as the cut deepens.

It is understood that the saw must follow the position of the frame K,so that the angle indicated by the frame I on top of the plate A willcorrespond with that of the cut made by the saw.

The several parts of the device are so arranged that they can beconveniently taken apart and folded up in small compass for carrying ina carpenters tool chest.

Having thus fully described our invention, We claim as new and desire tosecure by Letters Patent- 1. The combination with a frame to cross theupper side of a log and means for supporting the frame from the log, ofa vertically sliding gravity guiding-frame having depending members tostraddle the log and provided with saw guiding spaces through which thesaw is adapted to be reciprocated, substantially as set forth.

2. The combination with an elongated plate or support having means forsupportingit longitudinally above the upper side of a log, of atransverse frame pivoted centrally upon said plate and adjustablethereon longitudinally thereof and at any desired angle thereto, and avertically sliding gravity saw-guid ingframe the depending guiding armsof which straddle the log being sawed and are supported upon the back ofthe saw, substantially as set forth.

3. In a saw guide, the combination with a graduated plate, provided withdepending supporting devices to engage a log and support the platelongitudinally thereabove; of a frame held adjustably on the said plate,and a second frame mounted to slide vertically and loosely in the saidfirst-named frame, the said second frame straddling the log and ridingon the back of the saw blade, substantially as shown and described.

4. In a saw guide, the combination with a plate and means for supportingthe same above the log and from the log, of a frame held adj ustably onthe said plate and provided with vertical guideways, and a second framefitted to slide loosely in the said guideways and loosely straddling thesaw blade, substantially as shown and described.

5. In a saw guide, the combination with a plate and means for supportingthe same above the log and from the log, of a frame held adj ustably onthe said plate and provided with vertical guideways, a second framefitted to slide loosely in the said guideways and loosely straddling thesaw blade, and means, substantially as shown and described, forsupporting the said second frame on top of the said saw blade,substantially as shown and described.

6. In a saw guide, the combination with a plate made of two sectionshinged together and provided on its top with a graduation, and a sawguiding mechanism carried by said plate of supports for carrying thesaid plate, each support com prising a U shaped arm having openings inits ends, and L-shaped arms engaging the said apertured ends and boltedtogether above the plate, the vertical legs of the said L-shaped armscarrying adjustable screw rods for fastening the legs to the log to besawed, substantially as shown and described.

HENRY L. JOHNSTON.- JOHN E. SANDBERG.

WVitnesses:

D. J. SULLIVAN, H. R. DOUGHERTY.

